Texas Instruments TLV73328PDQNR3

Overview

TLV73328PDQNR3 from Texas Instruments is a capacitor-free, 300-mA, low-dropout linear regulator (LDO) in a 1.0-mm × 1.0-mm X2SON-4 package, delivering 2.8 V output with 1.4% max accuracy, 125 mV dropout at 300 mA (V_OUT = 3.3 V), and 34 µA quiescent current. It enables compact, low-power power rails in battery-powered portable electronics requiring fast startup and active output discharge.

For engineers reviewing the TLV73328PDQNR3 datasheet, TLV73328PDQNR3 pinout, TLV73328PDQNR3 application, or TLV73328PDQNR3 equivalent, key selection criteria include capacitor-free stability, thermal shutdown behavior, enable threshold voltage (VEN(HI) = 0.9 V), foldback current limiting, and compatibility with 1.4–5.5 V input sources in space-constrained designs.

Technical Context

The TLV73328PDQNR3 uses a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking. Its capacitor-free design eliminates mandatory output capacitance while maintaining stability across –40°C to +125°C junction temperature, supported by integrated undervoltage lockout (UVLO: 1.25–1.4 V) and active pull-down (120 Ω) for rapid output discharge during disable.

Functional modes include normal regulation, dropout operation (triode-region pass device), and shutdown-each governed by independent thresholds: EN pin logic (VEN(HI)/VEN(LO)), UVLO, thermal shutdown (160°C trip / 140°C reset), and foldback current limit (360–700 mA ILIM, reducing under short-circuit).

Key Specifications

Pinout & Package

TLV73328PDQNR3 is housed in a 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with an exposed thermal pad electrically connected to GND. The package supports high-density PCB layouts and enhanced thermal performance when the pad is soldered to a GND plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TLV73328PDQNR3, TLV73328PDBVR trades miniaturization for assembly flexibility, while TPS7A0528PDQNR offers lower IQ and dropout at the cost of mandatory output capacitance and altered enable compatibility-making TLV73328PDQNR3 the optimal choice for capacitor-free, space-constrained, 1.4–5.5 V input systems.

Availability

TLV73328PDQNR3 is available at Aetrix Electronics and suitable for smartphone subsystem power, wearable sensor rails, tablet display bias supplies, and industrial handheld UI controllers requiring stable component supply and long-term production continuity.

Supply support for TLV73328PDQNR3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in power management ICs for portable and industrial applications.

The TLV733 series was designed specifically for space- and power-constrained portable electronics, emphasizing capacitor-free operation, ultra-low IQ, and robust protection features across extended temperature ranges.

FAQ

What is the minimum input voltage required for TLV73328PDQNR3 to regulate 2.8 V output?

The TLV73328PDQNR3 requires VIN ≥ V_OUT + V_DO. At 300 mA and TJ = 25°C, V_DO is 270 mV for 2.8 V output, so minimum VIN is 3.07 V. Under worst-case conditions (TJ = 125°C), V_DO rises to ~300 mV, requiring VIN ≥ 3.1 V to maintain regulation. Below this, the device enters dropout mode.

Does TLV73328PDQNR3 require input or output capacitors to operate?

No-TLV73328PDQNR3 is explicitly designed for capacitor-free operation and remains stable with zero input or output capacitance. A small ceramic capacitor (e.g., 1 µF) on OUT is optional and improves load transient response, but is not required for stability per TI's SBVS235C datasheet Section 3.

How does the enable pin (EN) behave on TLV73328PDQNR3?

The EN pin is active-high with VEN(HI) ≥ 0.9 V (min) to enable regulation and VEN(LO) ≤ 0.35 V (max) to disable it. When disabled, TLV73328PDQNR3 activates a 120-Ω internal pulldown on OUT to discharge the load. No internal pullup/pulldown exists on EN, so external logic must drive it definitively.

What protection features are integrated into TLV73328PDQNR3?

TLV73328PDQNR3 integrates foldback current limiting (360–700 mA ILIM), thermal shutdown (160°C trip / 140°C reset), undervoltage lockout (UVLO: 1.25–1.4 V), and active output discharge. These operate independently and concurrently-no external components are needed to enable any of these protections.

Can TLV73328PDQNR3 be used with input voltages below 1.4 V?

No-TLV73328PDQNR3 has a specified minimum input voltage of 1.4 V per Recommended Operating Conditions (Section 6.3). Input below 1.4 V triggers undervoltage lockout (UVLO), disabling regulation. The absolute maximum rating allows VIN down to –0.3 V, but functional operation is not guaranteed below 1.4 V.